Sliding-door lock.



PATENTED NOV. 21, 1905.

L. A. TURNER.

SLIDING DOOR LOOK.

APPLICATION FILED NOV. 19, 1904.

2 BHEBTSSHEET 1.

2M I'neoaeo v PATENTED NOV. 21, 1905.

LA. TURNER.

SLIDING DOOR LOCK.

APPLIUATION FILED NOV. 19, 190.4.

' 2 SHEETS-SHEET z.

UNITED STATES- PATENT OFFICE.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed November 19, 1904. Serial No. 233,486.

To aZZ whom it may concern.-

Be it known that I, LUCIUS A. TURNER, a citizen of the United States,residing in the city and county of Denver and State of U010- rado, haveinvented certain new and useful Improvements in Gravity-Locks forSliding Doors; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

The invention herein relates to gravity-locks for sliding doors, and myimprovements therein reside in a novel construction of the'gravitybolt,in the novel construction of tumblers and wards, whereby and resultingfrom such novel construction of bolt and the locking tumblers and wardsthe bolt is held securely locked or is locked by a secondary keyengaging the shank of the bolt, and whereby a third key acting on theshank of the bolt serves to hold the bolt in its unlocked position andmay be used as a night-key, the construction of the parts allowing thekeys to be used from either side of the door, and in the claims appendedhereto and in connection with the accompanyingdrawingsl will point outthe parts and combinations of parts which constitute my invention.

Referring to the drawings, Figure 1 shows the lock mechanism in theposition the parts occupy when the bolt is locked. Fig. 2 is a like Viewshowing the gravity-bolt supported in its unlocked position by thedirect action of a third key. Fig. 3 is a vertical section taken on theline a 6 of Fig. 1, showing the tumblers for the main key for lockingand unlocking the bolt, a pair of independent keys for securing the boltin its locked position, and a pair of independent keys for holding thebolt out of its locked position. Fig. 4 shows in perspective thetumblers and wards in their assembled relation when looking the bolt.Fig. 5 shows in perspective the tumblers and wards separated. Fig. 6 isan edge view of the same. Fig. 7 shows the key-tang and its head foracting on the bolt to hold it out of locking position. Fig. 8 shows thepair of keys for looking the bolt and their relation to the bolt and thekeyhole 31. Fig. 9 shows the tumbler-actuating key. Fig. 10 shows one ofthe keys 9 for locking the bolt. Fig. 11 shows an enlarged section ofthe tumblers and wards and their relation to the key-barrel or stud.

The gravity-bolt 1 is adapted to have the function of a latch, and forthis purpose its locking end is formed with a hook 2, and the shank ofthe bolt stands obliquely in the case and is pivoted at its shank end,so that its upper end willconstantly tend to fall to project its hookoutside of face-plate 3 at the meeting edges of the doors to engage-andbe locked with the face-plate 4 of the meeting door. At its upper'endthe inner edge of the bolt opposite its hook has a concave formation 5,which terminates in a shoulder 6 at the lower end of the concave, and itis with this shoulder the tumblers engage to lock the bolt. From thisshoulder the shank has a second concave formation 7 on its inner edgewhich terminates in a shoulder 8 at the lower end of said concave, andit is with this shoulder a key 9 is caused to engage and form asupplemental lock for the bolt. On its other or under side the shank ofthe bolt has a third concave formation 10, which terminates in ashoulder 11 at the pivoted end of the shank, and with this shoulder akey-tang 12 is caused to engage to lift the bolt and to hold it out oflocking position, as in Fig. 2. This supplemental looking of the boltand of supporting the bolt out of locking position by the direct actionof keys upon the belt I will more particularly describe presently.

The case has three keyholes, all accessible from the opposite sides ofthe door, and therefore they are in the opposite sides of the lockcase,the upper ones, 13, being opposite the concave formation 5 at the upperend of the bolt and standing downward. From the upper keyholes a collar14, Figs. 5 and 11, projects within the case, and each collar isprovided with a slot 15, which corresponds with the slot of the keyholeand which in both plates are in alinement. Upon these collars is mountedto rotate a key-barrel or stud 16, and on these collars and key-barrelare assembled the locking tumblers and wards, as I will now describe. Oneach of the collars is fitted to turn against the inner wall of the casea tumbler 17, each being formed of a disk or hub having a radial arm 18,adapted to engage its shoulder 6 when the bolt is in locked position andto maintain it in such position. The hub or disk of each tumbler hasradial slots 19 19, disposed diametrically, and which when the tumblersare turned to their locked or unlocked position are caused to registerwith the keyholes in the case. The key-barrel or stud is formed with acircumferential shoulder 20, Fig. 5, by which it is confined within thecollars and has a longitudinal slot 21 open at both ends, while theshoulder has a longitudinal groove 22 diametrically opposite the slot.Upon the shoulder of this key-barrel or stud are mounted a pair of wards23 23, each ward being formed with radial slot 24, corresponding withthe longitudinal slot in the key-barrel, and a tooth 25, adapted toengage the groove 22 in the key-barrel shoulder, so that these wards andthe key-barrel are caused to turn together with the turning of the key.The outer walls of the fixed collars and of the key-barrel shoulder 20are of the same diameter, so that the tumblers and. the wards are fittedupon the key-barrel.

Between the wards 23 is a fixed ward 26, which has a radial slot 27,corresponding to the keyhole-slots in the case. The fixed ward thereforeseparates the pair of tumblers and the pair of movable wards. The innerface of the hub or disk of each tumbler has a semicircular recess ordepression 28 at that part next its radial arm, so that each radial slotin said hub forms ashoulder 29 29 in said recess, and into each of theserecesses the tang of the key operates to turn the tumblers. I prefer tomake the thickness of the hub part of the tumblers and the projection ofthe collars equal and the thickness of the movable and fixed wards equalto the width of the shoulder on which they are centered. When thetumblers are in position, with their arms in engagement with theshoulder of the bolt looking it, as in Fig. 1, one of the key-slots 19in each tumbler will register with the keyholes in the case, and whenthe bolt is in its unlocked position, as in Fig. 2, by turning thetumblers up and over against the inner wall of the back of the case thenthe other tumbler keyhole-slot 19 will register with the keyholes in thecase, so that at the limit of each movement of the pair of tumblers aslot in each will register with the lock keyholeslots. In inserting thekey (shown in Fig. 9) its tang will first engage the slot of thekeybarrel, and turning the barrel until its slot registers with the slotin the tumbler, the keytang will pass through said slot and into andthrough the slot in the ward, which always registers with slot in thekey-barrel, then turning the key to the right or to the left its tangwill pass into the slot in the fixed ward. Continuing to turn and pushin the key, its tang will pass into the slot in the next ward, and so oninto the slot of the next tumbler, thereby engaging the key with andturning the tumblers to either lock or unlockvthe bolt, and rendering itvery diflicult to pick the lock. For supplementing the locking functionof the tumblers I provide for locking the bolt by the direct action of akey 30, inserted through a keyhole 31 in either side of the lock-case.This key has a tubular barrel and engages a stud 32, projecting from thefixed ward to hold the key in position to cause its tang to be turned inthe concave 7 of the bolt in engagement with the shoulder 8 thereof, sothat the tang of the key will stand in such engagement at about rightangles to the shank of the bolt and prevent it from being raised whenlocked. For this purpose the keyhole 31 preferably stands horizontal,and the fixed ward has a guide-stud 32 on each side to engage a key fromeach side of the door. For holding the gravity-bolt up out of lockingposition keyholes 34: are made in the opposite lock-plates, within whichis mounted a stem 35, having its ends projecting beyond the lockplatesand having a key-tang 12 between the lock-plates adapted to engage theconcave formation 10 on the under side of the bolt-shank, so that onturning the tumbler up said keytang will engage the bolt-shank with alifting action until said key-tang engages the shoul- 'der 11 at thetermination of said concave standing in such engagement about at rightangles to the shank of the bolt, and thereby hold the bolt in itsunlocked position. The means for turning this key-tang 12 consists oftubular stems 37, mounted in the escutcheon-plate 38, and each having anutted head 39 for turning it, the inner ends of said stems beingadapted to engage the ends of the tang-stem. For this purpose aconvenient construction is shown of making the ends of the stems forkedand providing each of the tubular stems 37 with a transverse pin 40 forinterlocking with the forked ends of the stem 35, so that the latter maybe turned by the nutted head of either escutcheon-plate. This couplingalso adapts it for different thicknesses of doors. As

shown, only one of the doors is provided with v the lock. The meetingedge of the other door is provided with a slotted keeper-plate 1, withwhich the hook of the bolt engages.

It is important to note that the bolt is pivoted at its end upon a fixedstud 42, and that the construction of the bolt at this end provides forthe use of night-keys for lifting the bolt to unlock it and avoids theuse of knobs. This fixed bolt-stud serves to receive a screw to securethe removable plate to the lock-case. The lock may be used for singleand double sliding doors, and in the latter each door will be providedwith a hand-pull, and while I have shown such pull device it is notincluded in the claims of this patent, as it is made the subject of aseparate and distinct application filed by me of even date herewith.

I claim 1. In a sliding-door lock, a case, each side whereof having aninward-projecting keyhole-collar, each collar having a slotcorresponding with the keyholes, a gravity-bolt pivoted at'its innerend, its free end having a locking-hook on one edge and a curvedshouldered recess on its opposite edge, and a tumbler mounted on eachkeyhole-collar and having each a pair of radial slots and adapted tohole-collar, each collar having a slot corre' sponding with thekeyholes, a gravity-bolt pivoted at its inner end, its free end having alocking-hook on one edge and a curved shouldered recess on its oppositeedge, and a tumbler mounted on each keyhole-collar each tumbler having apair of radial slots, and having a radial arm adapted to engage saidbolt-shoulder to secure said bolt in its locked position, and a rotarykeyhole-barrel connecting said collars.

3. In a lock for sliding doors, the lockplates each having an inwardprojecting slotted collar at the keyhole, a-key-barrel or stud having alongitudinal slot and seated to rotate within said collars, a tumblermounted upon each collar, having a radial arm and a pair of radial slotsand a semicircular recess or depression forming shoulders at said slots,a ward fixed to the case and mounted on said key-barrel and having aslot registeringwith the slots in the lock-plates, a ward between eachtumbler and the fixed ward, and having a radial slot and engaged withand rotary with said barrel-stud, and a key adapted to engage and rotatethe key-barrel, the tumblers and the Wards engaged with said barrel, agravitybolt pivoted at its inner end on a fixed stud having alocking-hook at its free end and a shoulder on its upper inner sidearranged for engagement with the tumblers to lock thebolt.

4:. In a lock for sliding doors, a case, a gravity-bolt pivoted at itsinner end to a fixed stud, having a locking-hook at its free end and ashoulder opposite said hook, rotary tumblers for engaging said shoulderfor locking the bolt, a shoulder on the under side of the shank of saidbolt at its pivoted end, keyholes in the lock-plates, a tang mounted insaid keyholes, and heads adapted to engage the stem of said tang wherebythe latter is caused to engage the bolt-shank and lift and hold it outof looking position.

5. In a lock for sliding doors, a case, a gravity-bolt pivoted at itsinner end to a fixed stud, having a hook at its free end and a shoulderopposite said hook, a second shoulder above the pivot on the inner sideof the bolt, keyholes in the lock-plates at said second shoulder, afixed plate having pins projecting from its opposite sides, and a keyadapted to engage said fixed pins and said bolt-shoulder to secure thebolt in its locking position.

6. In a lock for sliding doors, a case, a gravity-bolt pivoted at itsinner end to a fixed stud, having a locking-hook at its free end and ashoulder at its pivoted end both on the under side of said bolt, and apair of shoulders on its inner side above said pivot, means engaging theshoulders on the inner side of the bolt for locking and for securingsaid bolt, and means for engaging the shoulder at the under side of saidbolt for unlocking and holding said bolt out of locking position.

7 In a sliding-door look, a case each side whereof having aninward-projecting keyhole-collar, each collar having a slotcorresponding with the keyholes, a gravity-bolt pivoted at its innerend, its free end having a locking-hook on one edge and a curvedshouldered recess on its opposite edge, a tumbler mounted on each collarand having each a pair of radial slots, each tumbler having a radial armadapted to engage said bolt-shoulder, a rotary slotted key-barrelconnecting said collars, a slotted ward having a fixed relation to andbetween said tumblers, and a rotary slotted ward between each tumblerand the said fixed ward.

In testimony whereof I have signed my name to this specification in thepresence of two su bscribing witnesses.

LUCIUS A. TURNER.

Witnesses:

. F. E. MILLER,

H. MOULTON SMITH.

